You'll beat tricky merchants and let bad shoppers pay for your bargain. By Bob Frick, Senior Editor December 19, 2011 I once lived in Rochester, N.Y., where having your car washed regularly during the five months of winter was a necessity (for some it was practically a religion). So much salt was spread on the roads that a corrosive, slushy brine would build up anytime it snowed. And it snowed a lot.SEE ALSO: Our Slide Show of 25 Ways to Waste Your Money Near my house was a super-duper car wash, trimmed in neon. It had two bays and offered all the extras. You could easily drop $25 on a wash there, and yet it was the best deal around. How could that be, given that there were other, less fancy car washes nearby that wouldn't charge nearly as much? And why didn't those other car washes advertise what a rip-off the fancy place seemed to be? Sponsored Content The trick -- which has an economic rationale that I'll discuss in a minute -- is just saying no. Like this: Advertisement "Would you like the wheel cleaning?" "No." "How about the clear coat?" "No." Advertisement "The Amazonian Carnauba wax?" "No." "The triple rust protection?" "No. Just the basic wash, please." Advertisement And for six or seven bucks, I got a nice car wash that removed the brine and got rid of the two-toned look -- salt up to mid-door panel, the car's actual color from there on up. My car didn't have the fleeting, sparkly sheen from clear coat and wax, but neither had I paid for those costly extras and the false sense of security against salt they brought. When I went from paying for the extras to buying just the bare-bones wash and saving a ton of money, I transitioned from being a myope to being a sophisticate, according to Harvard economics professor David Laibson and now NYU economics professor Xavier Gabaix. In my car-wash example, and in many other consumer situations, two kinds of exploitation occur, according to Laibson and Gabaix. In the first kind, businesses exploit myopic consumers who can't see that they're being charged ridiculously high rates for extras, paying hidden fees, or committing to expensive future upkeep. In the second, sophisticated consumers exploit businesses by just buying a basic service -- often an underpriced loss leader -- and ignoring the extras. The professors point to hotel rates as a prime example in a paper published in 2006 ("Shrouded Attributes, Consumer Myopia, and Information Suppression in Competitive Markets"). Consider a hotel offering consumers a room for $80 that costs $100 to supply, but charging big markups on room service, parking and, of course, the minibar. The myopic consumer gets the $80 room but pays so much more for the extras that the hotel makes far more than the $100 in costs. The sophisticated consumer, however, pays just $80, grabs a burger down the street, skips the minibar, and saves big. Laibson and Gabaix also point to credit cards that offer bonus miles but have high interest rates and hidden fees, and inexpensive Hewlett-Packard printers that need expensive ink refills. Just as the credit card fees are hidden in the fine print, the information on the cost of ink was many clicks away from the HP printer's home page. Advertisement What's the cause of consumer myopia, and how do you avoid it? Laibson says it boils down to short-term thinking, which is how we're wired. "With all animals, the stuff that's nearby is on the top of the mind, and the stuff that's far way isn't being focused on," says Laibson. You see this often when people buy a car and just focus on the price, not the future cost of repairs, he adds. So, to be sure you move yourself out of the myope (that is, sucker) category, consider all the future costs, as well as the extras, related to a purchase. But you've got to be aware of them first. In a free market, you'd think that competitors would seek an advantage by unmasking these high markups. In some cases, that happens. But in others, the professors hypothesize, it's best for everyone (except for the myopes, of course) to keep the information shrouded. Think about it: If you ran a hotel that charged a fair price without expensive markups, what would be the result if you advertised that your competitors ripped off customers by charging loss-leader prices for rooms and high markups on all the extras? You'd just educate customers that they're better off going to your competitors and not buying the extras. So, economically speaking, it makes sense for businesses to suppress the information. And let's face it: If it weren't for the myopes, sophisticated shoppers might not enjoy bargain-priced basics, either.